Boat.



CHARLES T. C. F. GBAEINER AND LEONARD JACOBSON, OF NEW YORK, N. Y.

BOAT.

To all whom it may concern:

Be it known that we, CHARLES T. G. F.

GREINER and LEONARD J ACOBSON, subjects of to provide a shallow bottomed boat having a collapsible double bottom adapted to be folded compactly under the boat for navigation in shallow harbors, rivers and'the like and adapted to be lowered to form a steady ing keel adapting the boat for open rough seas.

While the embodiment of the invention as herein illustrated is almost diagrammatic, it is understood that this is for illustrative purposes only, and that the invention may be adapted to almost any shape and kind of boat from the smallest row-boat to large seagoing vessels.

A boat of this kind has many advantageous uses. For instance, it may be used for transporting goods from the interior down rivers and, without transfer, across open seas. It is particularly adaptable for life boats adapted to rest on the deck of vessels when not in use, but verysteady in the water.

In the accompanying drawing, Figure 1 is a side elevation of the boat; Fig. 2 is a perspective view, and Fig. 3 is a transverse sectional view.

To each lower side edge of the hull 5 of the boat, by means of the hinges 6, are hinged a pair of keel sections or shutters 7 and 8 of suitable weight, dimensions and metal, depending upon the use of the boat. The shutter 7 is provided with long openings 9 near and parallel to the respective ends, through which are received tongues 10 provided with enlarged heads 11, for limiting the downward movement of the shutters. The enlarged head prevents the withdrawal of the tongue from the opening.

At each end of each shutter is provided tooth sectors 12, each engaged by a gear 13 mounted on the projecting end of one of the shafts 14, passing through watertight packings 16 and disposed longitudinally of the boat.

Specification of Letters Patent.

Patented Feb. 11, 1919.

Application filed October 26, 1916. Serial No. 127,908;

At an intermediate part these shafts are I connected by a chain of gears 16, one of which is engaged by a drive gear 17 provided with a handle 18. By this arrangement the shutters may be raised or lowered by revolving the handle 18.

The boat may be provided with a rudder I l 19, propeller 20 and a suitable motor 21.

It is particularly stressed that the raising and lowering means shown are for illustrative purposes only, since in large vessels power driven mechanism would be necessary. All of the details shown are merely for illustrative purposes.

When the shutters are in raised position, as in the full lines of Fig. 3, they form a false bottom to the boat, when lowered, as

in the dotted lines, they lower the center of gravity of the boat and form an eflicient steadying keel.

We claim as our invention 1. In a boat, a false bottom comprising shutters adapted to be lowered to form a steadying keel, and means for limiting the downward movement of the shutters and preventing separation thereof.

2. In a boat, a false bottom comprising shutters adapted to be lowered to form a steadying keel, means for limiting the downward movement of the shutters and preventing separation thereof, and means for raising and lowering the shutters.

3. In a boat, a hull having a closed bottom, a false bottom comprising shutters hinged to the closed bottom and adapted to to be lowered to form a steadying keel, and means for limiting the downward movement of the shutters and preventing separation thereof.

4. In a boat, the combination with the hull of the boat, of a pair of shutter blades hinged to the lower edges of the hull and adapted to be lowered to form a steadying keel; means for limiting the downward movement of the shutters and preventing separation thereof; toothed sectors, carried one near each end of each blade; longitudinal shafts passing lengthwise of the boat and both projecting from both ends thereof; and gears on the projecting ends of the shafts and in mesh with the toothed sectors.

5. In a boat, the combination with the hull of the boat, of a pair of shutter blades hinged to the lower edges of the hull; one shutter being provided with elongated transverse openings receiving headed tongues with which the other shutter is provided; longitudinal shafts passing through the boat and projecting at the ends; gears on the projecting ends; toothed sectors carried by said shutters and engaging said gears; and means for rotating the shafts in unison.

6. In a boat, the combination with the hull of the boat, of a pair of shutter blades hinged to the lower edges of the hull; one shutter bein'gtprovided' with elongated transverse openings receiving headed tongues with which the other shutter is provided; longitudinal shafts passing through the boat and projecting at the ends; packings in the end of the hull through which said shafts pass; gears on the projecting ends; toothed sectors carried by said shutters and engaging saidgears; a-chain of gears. connecting said shaftsi; a drive gear engaging one gear of :said chain; and a handle onsaid drive gear.

7. In a boat, a false "bottom comprising shutters adapted to be lowered to :form. a

relation against the boat, and means, me-

chanical'lyeonnected withboth shutters, for

.. positively driving both thereof in either direction. 8. In. a boat, a false bottom comprising hinged shutters adapted to be lowered to form,:a steadying keel, one shutter being provided with an elongated transverse opening, and the other shutter being. provided with-a tongue/fitting-said opening. 9. 115a boat,-a false bottom comprising hinged shutters adapted to be lowered-to form a steadying-keel, and means to hold said shutters when lowered into position, said-.means comprising a headed tongue on one shutter. and apa'rt; cooperating 'withthe tongue; oni'the other shutter.

In testimony whereof, wehave signed our nameseto this specification.

T. F. GREINER; LEQNARD .JAGOBSON.

Copies of thispatent may be obtained lior fflve cents each, by iaddxesmg the Commissioner sotlatents, Washington, D. 0. 

